The automatic differential lock vehicle
(57) Abstract:The invention relates to mechanical engineering and can be used in vehicles terrain. The automatic differential lock of a vehicle includes coupling halves 3 and 4, the elements of the mechanical connection of the coupling in the form of Cams with straight and inclined sections, return springs 12 and 13. The coupling 3 is installed on the splined Cup differential. The coupling 4 is made in one piece with polovoy gear 5. Return spring 12 is installed between the coupling 3 and the inner end surface of the Cup differential. Return spring 13 is installed between the coupling 3 and polovoy gear 5. Simplified design and improved controllability of the vehicle. 2 Il. The invention relates to mechanical engineering and can be used in vehicles terrain.A device lock differential, containing friction discs mounted on the shafts leading, cross, made of two parts, plates and a return spring, which automatically locks the differential contact author is. 200, Fig. 3.53).The disadvantage of this device is that this device is not fully locks the differential, and blocking properties largely depend on the load range on a car that is not suitable for trucks, in addition, it is necessary to increase the size differential when increasing the applied torque.A device lock differential, containing half-coupling mounted on the leading shafts of the differential and having elements for full differential lock, return spring and a mechanism for moving the coupling, which provides a complete locking and blocking properties do not depend on the load range on the car (see the journal "Revue Technique diesel", 171, 1991, pp. 65, 68).The closest to the essential features of the claimed technical solution is the automatic differential lock, containing half-coupling mounted on the leading shafts and having a mechanical connection elements in the form of Cams with straightforward work areas for full differential lock, control sensors turns leading shaft, registering ptx2">A disadvantage of the known device is the complexity of the design, as the sensor and recording device are complex electronic devices, the drive mechanism move is part of a pneumatic or hydraulic system of the vehicle, which involves the coordination of their parameters, the signals from the sensors to the register, and from him to the mechanism for moving the coupling halves are held by the electric wire, which must be protected from impact with foreign objects when the vehicle is moving, to optimally on the master bridge and in the vehicle, in addition, possible loss of controllability of the vehicle on the road with unstable coupling properties as the automatic lock operates in an oscillatory mode. So after coupling the coupling device to lock automatically to control the difference of the rotation speeds of the shafts leading disables equal intervals of time the movement of the coupling, in this case, if a slippery patch has not ended, then starts slipping, then the signals from the control sensors include a mechanism for moving the coupling, the differential is locked. This process thuja design automatic locking differential of the vehicle and to improve the controllability of the vehicle.The problem is solved due to the fact that in the automatic differential lock of a vehicle containing coupling with the mechanical connection elements in the form of Cams with straightforward work areas and installed on rotating parts having between a differential connection, the mechanism for moving the coupling, the mechanical connection elements additionally have sloping working area under the angle, determining the conditions lock the differential, and the mechanism for moving the coupling is made in the form of a spring.The analysis of the prior art, including searching by the patent and scientific and technical information sources, has allowed to establish that similar, characterized by signs, identical with all the essential features of the claimed technical solution is not found. The definition from the list of identified unique prototype as the most similar set of features analogue has allowed to establish the essential in relation to the technical result of the distinctive features in the claimed technical solution described in the claims. Therefore, the claimed technical solution meets delienne the device has the characteristics which are not in the known technical solutions, and their use in the claimed combination of features gives the opportunity to learn new technical result, therefore, the proposed solution meets the condition of "inventive step". 2 the Invention is illustrated by drawings, where
in Fig. 1 shows the automatic differential lock of the vehicle in the incision;
in Fig.2 - section a-a in Fig.1.The automatic differential lock of a vehicle includes a Cup differential, driven in rotation of the pinion. One of the cups differential consists of two parts 1 and 2, which form the inner hole where the coupling half 3 with the possibility of axial movement along the slots made in part 1 cups differential.The coupling 4 is made in one piece with polovoy gear 5. Elements of mechanical connection between the coupling halves 3 and 4 are made in the form of Cams 6, having a straight working sections 7 and inclined working areas 8.Half-shaft gear 5 is located on the axis 9 and rests on one side of the crossbar of the differential through a thrust bearing 10, and the other is 11 has a locking condition, incoming in a groove made in the bearing surface part 2 a Cup of differential and preventing the washer 11 against rotation.To return coupling 3 to the initial position has two springs, one of which is a disc spring 12, is installed between the coupling 3 and the inner end surface portion 2 cups differential. The spring 12 is dish-shaped to limit the geometry of the differential. Another spring 13 is installed between the coupling 3 and the thrust washer 11.To adjust the gap between the coupling halves 3 and 4 are the washers 14 and 15, which are mounted respectively between the spring 12 and the inner end surface portion 2 cups of differential and between the spring 13 and thrust washer 11.Between the Cup differential and polovoy gear 5 has a differential communication satellites to his, located on the crossbar.The automatic differential lock of the vehicle is as follows.In straight-line motion the angular velocity of the rotation Cup differential relative to polovoy gear 5 is equal to zero. The Cams 6 of the coupling halves 3 and 4 are in any of the provisions of the slippery road surface or when turning the vehicle Cup of differential and half-shaft gear 5 tend to rotate at different angular velocities, loading inclined working areas 8 lugs 6 of the coupling halves 3 and 4 torque. When the coupling halves 3 and 4 due to the interaction of inclined working areas 8 occurs axial force which overcomes the force of spring 12 moves the coupling 3 to exit out of engagement with the Cams 6 coupling 4, thereby the coupling 3 is rotated relative to the coupling hub 4 (see Fig.2, 2B). Further relative rotation occurs on the end surfaces of the Cams 6 of the coupling halves 3 and 4 (see Fig.2, 2B).After the interaction of end surfaces of the Cams 6 and the coupling half 3 under the action of the clamping spring 12 slides over the inclined working areas 8 of the coupling 4, jamming while the return spring 13 (see Fig.2, 2G).Axial velocity coupling 3 is determined by the following formula:
Voce. = V.tg,
V. = Rel.r,
where Voce. - the axial velocity coupling;
Vo. the relative linear speed between the Cup differential and polovoy gear 5;
- the angle of the work area 8 Cams 6;
Rel.- the relative angular velocity between the Cup differential and polovoy gear 5;
r is the average radius of Cams 6 of the coupling.Since the rotation of the transport creditprofile 13 manages to push the coupling half 3 before as will contact working straight sections 7, thereby returns the coupling half 3 in the original (initial) position, the differential is not locked.When the slipping of the vehicle when the relative speed between the Cup differential and polovoy gear 5 has a significant value, the spring 13 does not have time to push the coupling 3, a contact straight portions 7, thereby locking differential (see Fig.2, 2D).The differential remains locked up until the compression force between the rectilinear work areas 7 of the coupling halves 3 and 4, arising from the action of the torque which balances the force of the return spring 13. When you change or disappearance of torque due to alignment of the load on the axles, gear, etc., the spring 13 returns the coupling 3 to the original position.The claimed technical solution to meet the requirement of industrial applicability and possible to implement on stationary process equipment using modern technologies. The automatic differential lock of a vehicle containing two coupling halves, one is straight and inclined work areas, return spring, characterized in that the second coupling half mounted on the splined Cup differential, and a return spring mounted between the second coupling and polovoy gear, in addition, the device is equipped with an additional return spring installed between the second coupling and the inner end surface of the Cup differential.
FIELD: transport engineering.
SUBSTANCE: proposed differential has case 1 which accommodates coaxially installed axle-shafts of drive wheels, cages 7, 8, driven bushings 3, 4 with splines for connection with drive wheel axle-shafts coaxially installed in cages. Case 1 is made in form of cylindrical bushing on inner surface of which longitudinal wedging cavities for rollers 5, 6 are made. Each roller in each cavity can move along driven bushing from one wedging position into the other. Cages 7, 8 are made in form of hollow cylinders with rectangular holes on surface whose number corresponds to number of longitudinal wedging cavities for rollers. On end face surface of cages 7, 8 at least one slot is made on end face surface of one cage and hole with rigidly fitted-in pin on end face surface of other cage. Pin of one cage gets into slot of other cage forming movable link for angular displacement of cages in relatively opposite directions.
EFFECT: improved reliability, roadability and safety of vehicle.
FIELD: mechanical engineering.
SUBSTANCE: differential comprises housing (1), cross-shaped or straight shaft (5) of satellites, a number of satellites (4), and gear pair (2) of semiaxles. When gears (2) of semiaxles cooperate with satellites (4) the gear ratio changes at least in two stages. The number of stages is multiple to the number of teeth in satellites (4) and gears (2) of the semiaxles.
EFFECT: expanded functional capabilities.
16 cl, 5 dwg, 1 tbl
FIELD: transport engineering; bicycles.
SUBSTANCE: invention is designed for devices automatically changing gear ratio without interruption of power flow. Proposed drive contains two differentials. Force sensor 5 is installed between input shaft 8 and common input of both differentials, namely power differential 1 and regulating second differential 2. Said force sensor 5 cuts in braking device 4 at rise of load, said braking devices is idling at direct drive and is connected with regulating input of second differential 2. As a result, output gear 21 of second differential 2 starts rotating and self-braking drive 3 releases carrier 25 of power differential 1. Proposed drive automatically changes over from direct drive to drive with changed gear ratio. Moment of changing over can be regulated by tensioner 6 of spring 19 of force sensor.
EFFECT: facilitated selection of step-down gear in wide range of gear ration depending on individual capabilities of user.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to methods of control of differential locking of multidrive wheeled vehicles and it can be used at designing of systems to control tractive forces of driving wheels of multidrive vehicles and carrying out investigations of wheeled vehicles. proposed method of control of differential locks comes to locking of differential for definite periods of time at threshold values of mismatching of mechanical parameters of driving wheels intercoupled by said differential and unlocking differential at expiration of definite of time or at achievement of threshold value of steerability index. Unlocking of differentials at achievement of threshold value of steerability index is carried out individually, starting from differential whose locking has greater effect on steerability of wheeled vehicle.
EFFECT: enlarged range of control of traction forces on driving wheels to increase cross-country capacity and traction and speed properties at provision of required steerability of multidrive wheeled vehicles.
FIELD: transport engineering.
SUBSTANCE: invention can be used to increase cross-country capacity and stability of vehicle at braking. Proposed differential lock mechanism contains locking device in form of friction mechanism including two members 1 and 2. Friction mechanism consists of pack of friction disk 3 and steel disks 4, two control pistons 7, air feed head 8 with union 9. Members 1, 2 of clocking device are connected by pairs of gears 10, 11, 12, 13 with axle-shafts 14, 15. Device is furnished additionally with air fed control system consisting of angular velocity pickups 16, 17, electronic control unit 18, electromagnetic control valve 19, relief valve 20, change-over switch 21, connecting air lines and electric wires.
EFFECT: increased cross-country capacity and stability of vehicle.
FIELD: mechanical engineering; vehicle transmissions.
SUBSTANCE: proposed differential contains case 1, side gears 2, and 3, planet pinions and locking device. Locking devices is made in form of ring shifter 7 connected with drive 8, pushers 10 arranged inside axles 9 of planet pinions, intermediate members and locking members. Differential includes also elastic stop, and spring inserts 17 and 18 placed between case 1 and rear surfaces 20 and 21 of side gears 2 and 3. Grooves are made on end face front surfaces of side gears 2 and 3. Said grooves have wavy profile corresponding to profile of locking members, and number of radial grooves is even.
EFFECT: prevention of failure of differential lock caused by wedging of locking members between side gears, and falling out of locking members at unlocking, provision of stepless row of values of locking coefficient.
5 cl, 6 dwg
FIELD: automotive industry.
SUBSTANCE: invention can be used in differential drives of wheeled vehicles made for automatic locking of wheels. Proposed self-locking differential of vehicle contains drive case 1 accommodating axle shaft-members 4, 5 arranged coaxially to each other and coupled with axle-shafts 2, 3. Said axle-shaft members are provided with helical grooves 6, 7 on outer surface with opposite hand of helix, solids of revolution in form of balls 8 filling in line at least one closed channel 10 made in drive case. Part of said channel is opened to dip segments of balls into helical grooves. Closed channel 10 is made rectangular in longitudinal section, with rounded off outer angles 12. Cross section of legs of rectangular closed channel is equal to diameter of balls 8. Number of balls in channel is odd.
EFFECT: simplified design of differential, reduced overall dimensions, increased manufacturability, strength and efficiency at self-locking.
FIELD: transport engineering; vehicle transmissions.
SUBSTANCE: invention can be used in differential drives of vehicles with possibility of automatic wheel locking. Proposed self-locking differential of vehicle contains drive case accommodating axle-shaft members coupled with axle shafts and provided on outer surface semi-round in cross section screw grooves of opposite hand of helix, solids of revolution in form of balls filling, in chain, closed channels made in drive case and containing working grooves opened to dip ball segments into screws of axle-shaft members, longitudinal bypass channels and side return channels. Inner part of case consists of three parts. On extreme parts working grooves are made with opposite direction of helix relative to each other and to screw grooves of axle-shaft members. Middle part is made with width not exceeding diameter of balls and is furnished with through axial holes corresponding to size of diameter of balls. Angle of tilting of working and screw grooves to longitudinal axis is 74-76°. Side return channels in longitudinal section are made with sizes steplessly increasing from diameter of ball on ends of channels to 1.5 diameter of ball in central part of channels. Longitudinal bypass channels in cross section are made to size of diameter of ball, and inner side of channels is made at angle of 1-2° to center of bypass channel, with stepless transition in place of connection.
EFFECT: improved reliability and efficiency of locking.
4 cl, 3 dwg
SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their upper surface, have spiral channels running in a direction opposite the spiral, odd number of rolling elements (balls), one closed channel containing a working groove open for inserting ball segments into the spiral channels of the half shaft elements; a longitudinal return channel with dimensions equal to the ball diameter, connected by intermediate channels made in the lids of the power-driven shell. The outside surface of the intermediate channels in the longitudinal section has a radius equal to 1.25 diameters of the ball; and their wall, at the outlet to the zone of connection to the return channel, contains a straight section. In the lids, a slot with dimensions equal to those of the working groove is made for placement of spiral channels of the half shaft elements in the intermediate channels area.
EFFECT: increased reliability of self-blocking differential.
4 cl, 2 dwg
SUBSTANCE: the self-blocking differential contains a power-driven shell with lids, in which half shaft elements are placed coaxially and connected with the half shaft. The half shaft elements, on their external surface, have spiral grooves with a semi-circular cross-section, the direction of which is reverse to that of the spiral, rolling elements (balls) filling the closed channels in the power-driven shell, in chains. The closed channels contain working grooves open for inserting ball segments into the spiral grooves. The longitudinal bypass channels and the side return channels are formed by slots in the lids and cuts around the perimeter of the distribution washers installed on the half shaft elements. The distribution washers have a diameter equal to the working groove dimension.
EFFECT: increases reliability of self-blocking differential.
2 cl, 1 dwg